I'd like to chime in here because I, too, had contact with OW in my sitch. She called a few times, and emailed, me, too. Mostly I ignored her. I never answered her emails. I did end up talking to her on the phone once but only because the phone I picked did not have caller ID on it. I didn't know it was her.
She began making contact when the A with my H was dying. She was getting desperate. I don't know what she was trying to accomplish -- perhaps wanted to just p!ss me off OR she was mad at H and this was her way to lash out. As Michelle, said, I think it was insecurity, too.
I think OW in your sitch is showing her anger. Just ignore her. Don't answer her texts or calls. She isn't worth your time. And, if you want to keep your PMA, ignoring her will make your feel better (even if it's because you know you're p!ssing her off by ignoring her!).
I'm sure she's expressing anger and impatience at your H, too, so keep on smiling. She's showing her true colors.
